Question

в цветочный магазин привезли 200 белыих и красных роз. Когда продали 40 красных роз, то их осталочь столько, сколько и белых. Сколько роз каждого цвета привезли в магазин?

Answer 1

80 белых и 120 красных! Решается всё очень просто:
Было 200 роз, когда убрали 40 красных, осталось одинаковое количество цветов (160). 160 мы делим на 2 (красные и белые), получается 80 белых и 80 красных, к 80 красных мы прибавляем 40 проданных, получается 120 красных.
Запись выглядит так:
1) 200-40=160(роз)-после прожажи.
2) 160:2=80 (роз)-белых 
3) 80+40= 120(роз)-красных 
Ответ: 80 белых, 120 красных.

Answer 2

Problem Analysis

To solve this problem, we need to determine the number of white and red roses that were brought to the flower shop. We are given that a total of 200 roses were delivered, consisting of white and red roses. Additionally, we know that when 40 red roses were sold, the remaining number of red roses was equal to the number of white roses.

Solution

Let's assume that the number of white roses brought to the shop is represented by the variable W, and the number of red roses is represented by the variable R.

From the given information, we can form two equations:

1. The total number of roses delivered is 200: W + R = 200.

2. When 40 red roses were sold, the remaining number of red roses was equal to the number of white roses: R - 40 = W.

We can solve this system of equations to find the values of W and R.

Solving the System of Equations

To solve the system of equations, we can use the substitution method. We'll substitute the value of W from the second equation into the first equation.

Substituting R - 40 for W in the first equation, we get:

(R - 40) + R = 200.

Simplifying the equation, we have:

2R - 40 = 200.

Adding 40 to both sides of the equation, we get:

2R = 240.

Dividing both sides of the equation by 2, we find:

R = 120.

Now that we have the value of R, we can substitute it back into the second equation to find the value of W:

120 - 40 = W.

Simplifying the equation, we have:

W = 80.

Answer

Therefore, the flower shop received 80 white roses and 120 red roses.